Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdbb5ffe0729937d…

MALICIOUS

PDF

81.0 KB Created: 2021-06-07 21:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 79905151161c6c63af416ce2924c1e68 SHA-1: 469f7286f19d047c20451253a99dd78179e3b06f SHA-256: bdbb5ffe0729937d5a54c5c42c0a8264fb20be7e66b4498c5fc03941d6a9f082
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that is likely used to host or redirect to malicious content. The PDF structure and the presence of embedded URLs suggest an attempt to trick users into visiting a malicious site, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nomylo.ru/pbw?utm_term=long+vowel+silent+e+worksheets+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386080/normal_6005f4e4405a5.pdfIn PDF document text
    • https://defonufagij.weebly.com/uploads/1/3/4/3/134360363/b55520fa89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473044/normal_5fe653f53584f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427538/normal_60655fc20866e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392195/normal_5ff9c2ebbeb6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_6022d9e831d06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413851/normal_5ff8de1217049.pdfIn PDF document text
    • https://nukilowemetidu.weebly.com/uploads/1/3/4/7/134712118/2670720.pdfIn PDF document text
    • https://kolojadulosa.weebly.com/uploads/1/3/1/3/131397946/29963.pdfIn PDF document text
    • https://zovuzutozureje.weebly.com/uploads/1/3/0/7/130739602/690ccbc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478950/normal_60b84b3f8c94f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4916b13e-5d9b-43aa-92b7-9ce7d16f5ab6/94354030096.pdfIn PDF document text
    • http://kelivesas.pbworks.com/f/phoolon_ka_taron_ka_sabka_kehna_hai_female_song_download_mp3.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/64705768140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d6eea5b-33f1-4c23-829a-b5a69c31c208/quy_nh_v_m_ti_khon_ngn_hng.pdfIn PDF document text
    • http://tujelupirobe.pbworks.com/w/file/fetch/144500985/sidojo.pdfIn PDF document text
    • http://tagexoba.pbworks.com/f/fluffy_slime_without_glue_borax_or_contact_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77f64eae-640b-4dac-9f11-adc23c39d1b7/minebagatemupibokage.pdfIn PDF document text
    • http://girirabujud.pbworks.com/w/file/fetch/144746307/dazaz.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/f/charles_dickens_novels_free_download.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/potufekovi.pdfIn PDF document text
    • http://momoruxoxim.pbworks.com/f/mumelefodokeniripeko.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB5 4976 bytes
SHA-256: 3a100f5e4fbaec7812fab4c483a5f1fec5d5ff62b862ff3943d8982fee8b84ae
font_01_sfnt_off00010dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC3 12640 bytes
SHA-256: 104c595ffec66cee87e19fc45bc035315cce90585db232d559132506fdba2335

Open this report in the interactive analyzer, or submit your own file for analysis.